I have a 2006 Town & Country that threw a P0441 yesterday, so I started with checking the purge solenoid, I checked it's resistance, 14.26 Ohm which seems reasonable. So now I'm thinking the NVLD Vacuum switch is the problem, but after checking some online part websites it doesn't seem possible to purchase a NVLD Vacuum switch, is the switch part of the NVLD detection pump?

 

Take off the air cleaner. Both upper and lower parts. Right behind it there is a vacuum hose that connects to a metal line. It's close to one of the AC service ports. It will probably be split. Also check your vacuum line on the back side of the throttle body.